Extensions of the Valence Theory of Boron Compounds.

12 The decrease in energy was not found to increase instrumental stray light significantly. The stray light characteristics of the instrument are discussed elsewhere., 3Jones, R. N., J. Am. Chem. Soc., 74, 2681 (1952). 14 A similar apparatus is described by J. Cunningham and F. C. Tompkins, Proc. Roy. Soc., A251, 27 (1959). 51 Simpson, W. T., and D. L. Peterson, J. Chem. Phys., 26, 588 (1957). 16 In this simple calculation, as in all other deductions from the polarization spectra of poly--ymethyl-I-glutamate, it is assumed that the ester grouping does not contribute at a detectable level to the absorption. Ley and Arends (Z. physik. Chem., B17, 177 (1932)) give em,,, = 60 for ethyl acetate. 17 Kasha, M., Symposium on Light and Life, ed. W. D. McElroy and B. Glass (Baltimore: The Johns Hopkins Press, 1961), p. 31. 18 Simmons, N. S., and E. R. Blout, Biophys. J., 1, 55 (1960). "9Simmons, N. S., C. Cohen, A. G. Szent-Gy6rgyi, D. B. Wetlaufer, and E. R. Blout, J. Am. Chem. Soc., in press (1961).